The actress tells THR her stunt double "did a 66-foot free fall," adding "There's actually a lot of stuntmen who have died doing that stunt." Director Neil Burger says making the film as real as possible was important. "Whether it be jumping on the train or the fights or just being on the streets. Making it, and not to do it CG and not to do it digitally and actually be on the streets of Chicago," says Burger.